Yamaha F100B F100C Outboards Factory Service Manual, Page 186Get this manual
Lower unit
Removing the propeller shaft housing assembly
1Straighten the claw washer tabs a, and then remove the ring nut and claw washer
Ring nut wrench 1: 90890-06511 Ring nut wrench extension 2: 90890-06513 2Pull out the propeller shaft housing assembly
Bearing separator 1: 90890-06534 Stopper guide plate 2: 90890-06501 Stopper guide stand 3: 90890-06538 Bearing puller 4: 90890-06535 Bearing puller claw 5: 90890-06536 NOTE: Install the bearing separator between the reverse gear and thrust washer completely2Remove the ball bearing